On OSX this typically means that you have moved your “Home” folder to another drive or have another drive mounted on the root /Users folder.
To resolve this issue you will need to create a symbolic link to the /Users folder from the /Volumes folder.
In my scenario, my Volume Name is “Users” which is being mounted to /Users using fstab.
$ cd /Volumes
$ sudo ln -sf /Users ./Users
In FINDER, you can goto /Volumes and it will show a hard disk icon which will direct you to /Users folder.
This fixes an issue with the startup screen and the test/debug movie functionality.